3v4l.org

run code in 300+ PHP versions simultaneously
<?php class bad { private $_private = array(); public function __construct() { $this->_private[] = 'oh noes'; } public function __destruct() { //echo "bad::destructor\n"; global $bar; $bar = $this->_private; } } $foo = new stdclass; $foo->foo = $foo; $foo->bad = new bad; print_r($foo); gc_disable(); for ($i=0; true; $i++) { $deep_clone = unserialize(serialize($foo)); gc_collect_cycles(); var_dump($i); }

Here you find the average performance (time & memory) of each version. A grayed out version indicates it didn't complete successfully (based on exit-code).

VersionSystem time (s)User time (s)Memory (MiB)
8.3.60.0430.02618.30
8.3.50.0300.03517.32
8.3.40.0240.06118.71
8.3.30.0300.04018.64
8.3.20.0250.01418.60
8.3.10.0170.01718.67
8.3.00.0170.02419.38
8.2.180.0250.01916.63
8.2.170.0230.02622.96
8.2.160.0200.01718.77
8.2.150.0100.01024.18
8.2.140.0200.01624.66
8.2.130.0150.00626.16
8.2.120.0170.00717.80
8.2.110.0120.01220.43
8.2.100.0250.01617.78
8.2.90.0090.01219.21
8.2.80.0070.01417.97
8.2.70.0090.01317.50
8.2.60.0120.00918.04
8.2.50.0120.00918.07
8.2.40.0030.01718.16
8.2.30.0120.00921.21
8.2.20.0060.02117.84
8.2.10.0130.01017.69
8.2.00.0070.01717.68
8.1.280.0320.00625.92
8.1.270.0090.00924.66
8.1.260.0060.01626.35
8.1.250.0170.01428.09
8.1.240.0070.02123.91
8.1.230.0110.03223.99
8.1.220.0060.01618.77
8.1.210.0070.01718.89
8.1.200.0090.01917.22
8.1.190.0030.01917.51
8.1.180.0030.01818.10
8.1.170.0100.01318.61
8.1.160.0000.02018.83
8.1.150.0040.01918.54
8.1.140.0030.01917.45
8.1.130.0110.01117.44
8.1.120.0070.02017.45
8.1.110.0030.01717.46
8.1.100.0160.00917.41
8.1.90.0080.01217.54
8.1.80.0150.00717.47
8.1.70.0090.01217.43
8.1.60.0030.01917.60
8.1.50.0060.01517.42
8.1.40.0100.01317.59
8.1.30.0060.01617.61
8.1.20.0140.01117.59
8.1.10.0060.01517.55
8.1.00.0030.02017.53
8.0.300.0030.01919.71
8.0.290.0100.01016.93
8.0.280.0000.01918.36
8.0.270.0030.01716.66
8.0.260.0070.01416.75
8.0.250.0030.02416.79
8.0.240.0060.01516.86
8.0.230.0100.01316.89
8.0.220.0070.01816.77
8.0.210.0100.01016.71
8.0.200.0030.01716.68
8.0.190.0030.02416.82
8.0.180.0030.01716.91
8.0.170.0090.01816.86
8.0.160.0040.01816.84
8.0.150.0130.01316.81
8.0.140.0070.01416.78
8.0.130.0030.02313.27
8.0.120.0060.02216.78
8.0.110.0100.01716.74
8.0.100.0060.01316.63
8.0.90.0030.01716.57
8.0.80.0130.07416.80
8.0.70.0100.01016.63
8.0.60.0060.01716.59
8.0.50.0000.02116.85
8.0.30.0430.02616.87
8.0.20.0340.07116.86
8.0.10.0030.02416.85
8.0.00.0500.08716.73
7.4.330.0000.01812.94
7.4.320.0140.01016.34
7.4.300.0100.01016.46
7.4.290.0060.01516.46
7.4.280.0030.02816.34
7.4.270.0120.01516.45
7.4.260.0100.01413.23
7.4.250.0040.02516.45
7.4.240.0030.02116.39
7.4.230.0030.02316.47
7.4.220.0260.07416.28
7.4.210.0190.07516.50
7.4.200.0000.02116.47
7.4.190.0070.01316.59
7.4.160.0570.05416.43
7.4.150.0480.08316.39
7.4.140.0320.07417.86
7.4.130.0430.12816.52
7.4.120.0270.08916.31
7.4.110.0370.03816.39
7.4.100.0510.07416.45
7.4.90.0220.07016.36
7.4.80.0180.07919.39
7.4.70.0270.06016.43
7.4.60.0340.06216.38
7.4.50.0070.02416.24
7.4.40.0070.05316.36
7.4.30.0220.04516.45
7.3.330.0070.02013.26
7.3.320.0090.01913.22
7.3.310.0140.01416.26
7.3.300.0000.02016.24
7.3.290.0080.05416.18
7.3.280.0160.07516.16
7.3.270.0320.07616.30
7.3.260.0360.08016.18
7.3.240.0700.07016.43
7.3.230.0490.10816.45
7.3.210.0310.08416.38
7.3.200.0220.06816.36
7.3.190.0380.07316.25
7.3.180.0340.06116.42
7.3.170.0280.08016.35
7.3.160.0310.08416.26
7.3.120.0100.04914.77
7.3.110.0160.06515.07
7.3.100.0130.04614.75
7.3.90.0110.05014.84
7.3.80.0140.04514.50
7.3.70.0170.03714.84
7.3.60.0170.04714.49
7.3.50.0110.04015.02
7.3.40.0070.04614.80
7.3.30.0210.03214.64
7.3.20.0280.03116.66
7.3.10.0190.02916.35
7.3.00.0190.03216.38
7.2.330.0300.12616.70
7.2.320.0200.07316.65
7.2.310.0280.09416.50
7.2.300.0280.08916.65
7.2.290.0230.06516.56
7.2.240.0030.05914.89
7.2.230.0200.04615.02
7.2.220.0130.04014.95
7.2.210.0190.03815.11
7.2.200.0200.03314.77
7.2.190.0160.03814.95
7.2.180.0270.02415.00
7.2.170.0100.04315.00
7.2.160.0160.03014.98
7.2.150.0200.03816.82
7.2.140.0220.02616.82
7.2.130.0140.05116.84
7.2.120.0150.03716.91
7.2.110.0210.02916.93
7.2.100.0200.04016.80
7.2.90.0170.04016.68
7.2.80.0200.02716.79
7.2.70.0290.01316.72
7.2.60.0200.02316.88
7.2.50.0150.03416.75
7.2.40.0210.04516.70
7.2.30.0140.03516.70
7.2.20.0100.02516.59
7.2.10.0130.03116.72
7.2.00.0150.03318.17
7.1.330.0100.04115.88
7.1.320.0140.02115.81
7.1.310.0170.05315.87
7.1.300.0130.04415.88
7.1.290.0130.02615.77
7.1.280.0100.04215.66
7.1.270.0060.04815.75
7.1.260.0200.03315.84
7.1.250.0230.02715.89
7.1.200.0240.02015.81
7.1.70.0060.01117.03
7.1.60.0100.04619.21
7.1.50.0140.03816.99
7.1.00.0100.09322.34
7.0.200.0070.02016.71
7.0.140.0070.09721.94
7.0.120.0130.09022.14
7.0.100.0270.10319.91
7.0.90.0130.08019.94
7.0.80.0100.07021.65
7.0.70.0030.10021.61
7.0.60.0130.09021.69
7.0.50.0200.11022.05
7.0.40.0130.09719.98
7.0.30.0030.10020.19
7.0.20.0070.06720.14
7.0.10.0070.11320.08
7.0.00.0100.09020.04
5.6.280.0100.06721.02
5.6.250.0100.08020.49
5.6.240.0100.07720.54
5.6.230.0000.05720.49
5.6.220.0130.04020.52
5.6.210.0030.05020.72
5.6.200.0070.08721.13
5.6.190.0070.04021.00
5.6.180.0070.08321.06
5.6.170.0100.08021.20
5.6.160.0070.07721.16
5.6.150.0070.06021.12
5.6.140.0000.07721.03
5.6.130.0070.06721.11
5.6.120.0000.07020.95
5.6.110.0030.04021.13
5.6.100.0070.08321.03
5.6.90.0130.08321.04
5.6.80.0030.08320.34
5.6.70.0000.04320.49
5.6.60.0100.07320.46
5.6.50.0070.08320.36
5.6.40.0100.06320.43
5.6.30.0100.07020.43
5.6.20.0100.03720.42
5.6.10.0070.07320.51
5.6.00.0070.08020.38
5.5.380.0130.09720.34
5.5.370.0130.11320.57
5.5.360.0170.09720.39
5.5.350.0270.08020.51
5.5.340.0270.08720.88
5.5.330.0170.07720.89
5.5.320.0370.07320.91
5.5.310.0130.09720.87
5.5.300.0230.08320.95
5.5.290.0100.09720.91
5.5.280.0000.06720.92
5.5.270.0070.08020.94
5.5.260.0030.04320.91
5.5.250.0070.06720.66
5.5.240.0030.04320.32
5.5.230.0070.08020.31
5.5.220.0030.08020.27
5.5.210.0100.04020.20
5.5.200.0130.07320.22
5.5.190.0100.04320.15
5.5.180.0030.06720.24
5.5.160.0200.06320.13
5.5.150.0100.05020.13
5.5.140.0070.07720.29
5.5.130.0030.08020.29
5.5.120.0100.07720.28
5.5.110.0130.07020.28
5.5.100.0130.07020.09
5.5.90.0030.05320.11
5.5.80.0030.04320.14
5.5.70.0070.07320.08
5.5.60.0030.04020.02
5.5.50.0030.03719.95
5.5.40.0070.03720.07
5.5.30.0030.03720.04
5.5.20.0070.03720.00
5.5.10.0070.03320.05
5.5.00.0030.04020.05
5.4.450.0070.08019.17
5.4.440.0130.07319.30
5.4.430.0100.05719.32
5.4.420.0030.08319.39
5.4.410.0070.04319.10
5.4.400.0130.05319.05
5.4.390.0100.07018.80
5.4.380.0030.07718.98
5.4.370.0100.07019.02
5.4.360.0070.07319.00
5.4.350.0070.06718.86
5.4.340.0130.06718.91
5.4.320.0070.07718.84
5.4.310.0100.04718.90
5.4.300.0130.04018.94
5.4.290.0070.07718.98
5.4.280.0130.06319.00
5.4.270.0130.04718.90
5.4.260.0070.04319.07
5.4.250.0070.04018.94
5.4.240.0100.07719.04
5.4.230.0030.06018.98
5.4.220.0000.04318.98
5.4.210.0030.04019.00
5.4.200.0030.03718.88
5.4.190.0030.03719.04
5.4.180.0070.03318.82
5.4.170.0030.03718.95
5.4.160.0070.03318.81
5.4.150.0070.03318.95
5.4.140.0030.03316.40
5.4.130.0030.03716.25
5.4.120.0000.04016.39
5.4.110.0170.02716.37
5.4.100.0030.03716.38
5.4.90.0000.03716.29
5.4.80.0000.03716.44
5.4.70.0000.04016.33
5.4.60.0000.03716.39
5.4.50.0030.03716.29
5.4.40.0030.03716.24
5.4.30.0000.03716.41
5.4.20.0000.03716.46
5.4.10.0000.04316.38
5.4.00.0030.03315.73
5.3.290.0070.07715.68
5.3.280.0070.06715.68
5.3.270.0100.03715.68
5.3.260.0030.04015.68
5.3.250.0030.04015.68
5.3.240.0030.03315.68
5.3.230.0000.04015.68
5.3.220.0030.04015.68
5.3.210.0000.04315.68
5.3.200.0070.04315.68
5.3.190.0170.02315.68
5.3.180.0100.03015.68
5.3.170.0070.03315.68
5.3.160.0070.03315.68
5.3.150.0030.04015.68
5.3.140.0000.04015.68
5.3.130.0030.03715.68
5.3.120.0000.04015.68
5.3.110.0170.02315.68
5.3.100.0030.03715.68
5.3.90.0100.02715.68
5.3.80.0100.03015.68
5.3.70.0000.05315.68
5.3.60.0100.03015.68
5.3.50.0000.03715.68
5.3.40.0070.03315.68
5.3.30.0000.04015.68
5.3.20.0200.05717.82
5.3.10.0330.06317.73
5.3.00.0170.07017.95

preferences:
48.11 ms | 401 KiB | 5 Q